Principles of Operation of Torque Power (absorbing) Dynamometers
An absorbing dynamometer acts as a load that is driven by the prime mover that is under test (e.g. Pelton wheel). The dynamometer must be able to operate at any speed and load to any level of torque that the test requires.
Absorbing dynamometers are not to be confused with "inertia" dynamometers, which calculate power solely by measuring power required to accelerate a known mass drive roller and provide no variable load to the prime mover.
An absorption dynamometer is usually equipped with some means of measuring the operating torque and speed.
The Power Absorption Unit of a dynamometer absorbs the power developed by the prime mover. This power absorbed by the dynamometer is then converted into heat, which generally dissipates into the ambient air or transfers to cooling water that dissipates into the air. Regenerative dynamometers, in which the prime mover drives a DC motor as a generator to create load, make excess DC power and potentially - using a DC/AC inverter - can feed AC power back into the commercial electrical power grid, where the power produced is eventually converted back into heat (as in an oven or light bulb).
Absorption dynamometers can be equipped with two types of control systems to provide different main test types.
Read more about this topic: Dynamometer
Famous quotes containing the words principles, operation, torque and/or power:
“Magic is akin to science in that it always has a definite aim intimately associated with human instincts, needs, and pursuits. The magic art is directed towards the attainment of practical aims. Like other arts and crafts, it is also governed by a theory, by a system of principles which dictate the manner in which the act has to be performed in order to be effective.”
—Bronislaw Malinowski (1984–1942)
“It is critical vision alone which can mitigate the unimpeded operation of the automatic.”
—Marshall McLuhan (1911–1980)
“Poetry uses the hub of a torque converter for a jello mold.”
—Diane Glancy (b. 1941)
“The power confided in me will be used to hold, occupy and possess the property and places belonging to the government, and to collect the duties and imposts.”
—Abraham Lincoln (1809–1865)